Sleep helps to regulate hormones that impact stress. With chronic sleep deprivation, stress hormones like cortisol can wreak havoc on your body, increasing your blood pressure.

Sleep deprivation slows your reaction time to a degree that is comparable to drunk driving, leading to a higher risk of car accidents.

Without adequate sleep, blood vessels around your eye dilate, increasing blood flow. Because that skin is thinner, the increased blood flow is observed in the form of bags under your eye.

Sleep is vital for consolidating and storing information in the brain. With inadequate sleep it becomes difficult to focus and create memories, which impairs learning.

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During sleep, your immune system releases cytokines. Cytokines help to fight infection and inflammation. Sleep deprivation reduces the release of cytokines, negatively impacting your immune system’s ability to fight infection and disease.

NREM sleep helps the body relax and recover, while REM sleep is characterized by heightened activity. insufficient sleep can throw off the balance of the stages of sleep, giving inadequate recovery time and increasing the risk of heart attacks.

Sleep deprivation can exacerbate the symptoms of several mental illnesses, including depression and anxiety.

Sleep helps to ensure the proper function of both insulin and apatite regulating hormones. When these hormones aren't working properly, blood sugar levels increase and your brain stops recognizing that you are full, leading to weight gain and diabetes.